US7515030B2 - Fuse insert having a flat insulating body - Google Patents

Fuse insert having a flat insulating body Download PDF

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Publication number
US7515030B2
US7515030B2 US10/582,733 US58273304A US7515030B2 US 7515030 B2 US7515030 B2 US 7515030B2 US 58273304 A US58273304 A US 58273304A US 7515030 B2 US7515030 B2 US 7515030B2
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US
United States
Prior art keywords
insulating body
fuse insert
shaft
plug
insert according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US10/582,733
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English (en)
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US20070080772A1 (en
Inventor
Henning Schulte
Jürgen Scheele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Littelfuse Europe GmbH
Original Assignee
Littelfuse Automotive GmbH
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Filing date
Publication date
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Assigned to WILHELM PUDENZ GMBH reassignment WILHELM PUDENZ GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHULTE, HENNING, SCHEELE, JURGEN
Publication of US20070080772A1 publication Critical patent/US20070080772A1/en
Assigned to LITTELFUSE AUTOMOTIVE GMBH reassignment LITTELFUSE AUTOMOTIVE GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: WILHELM PUDENZ GMBH
Application granted granted Critical
Publication of US7515030B2 publication Critical patent/US7515030B2/en
Assigned to LITTELFUSE EUROPE GMBH reassignment LITTELFUSE EUROPE GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: LITTELFUSE AUTOMOTIVE GMBH
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H01H85/0415—Miniature fuses cartridge type
    • H01H85/0417—Miniature fuses cartridge type with parallel side contacts

Definitions

  • the invention relates to a fuse insert having a flat insulating body and a pair of contacts projecting out of the insulating body, whose contact segments, which can be accommodated in accommodations of the insulating body, are connected with one another by way of a fusible conductor.
  • Fuse inserts having a flat insulating body are inserted into fuse holders with their contact tongues.
  • Each fuse holder forms a disconnect in the line of a current circuit, and when the current circuit is intact, the fusible conductor bridges the disconnect. If a fault current occurs, the fusible conductor burns through, if applicable, and interrupts the current circuit.
  • the insulating body that carries a fuse insert in each instance, consists of plastics that are suitable for this purpose.
  • the fuse inserts are generally punched parts made of metal, which are to be installed into the insulating body.
  • the pre-finished insulating bodies and the fuse inserts, which are also pre-finished, if necessary, are brought together and connected with one another within a production line.
  • connection with heat also has the disadvantage that increased scrap rates can occur during the production of fuse inserts. This is connected with the fact that heating and cooling processes that proceed in absolutely uniform manner cannot be guaranteed, for example if only because of varying ambient temperatures at the production site.
  • the invention is based on the task of simplifying the manner in which the individual parts are combined to form a fuse insert, without having to accept losses in quality and, in particular, increases in cost in this connection.
  • connection elements of a positive-lock connection can easily be affixed to the components to be joined together, before they are joined together.
  • the corresponding connection elements can easily be formed, and they then enter into a positive lock when the individual parts of a fuse are combined. In this connection, no additional processes, such as hot embossing or ultrasound bonding, are then required.
  • the fuse inserts are simply joined together with the insulating body, particularly plugged into one another.
  • each accommodation is configured as a plug-in shaft
  • each contact segment of the fuse insert is configured as a shaft part that can be inserted and fits into the plug-in shaft.
  • a first connection element can project into the plug-in shaft, and the shaft part can have at least one engagement for this connection element.
  • the reverse arrangement is also possible, namely that an engagement is formed on the plug-in shaft, for a connection element that projects from the shaft part.
  • placing engagements on the contact segments of the contacts of a fuse insert has the advantage that the expenditure of material and labor for the production of the fuse inserts is reduced to a minimum.
  • every engagement is a longitudinal groove formed in the respective contact segment.
  • Each first connection element is then an elevation that projects into the plug-in shaft, in the form of a tongue that matches the longitudinal groove.
  • the contact segments of the contacts of the fuse insert can thereby be pushed into the insulating body, in order to produce the fuse.
  • Groove and tongue have the advantage of improving the stability between the fuse insert, configured as a flat plug, and the insulating body. A reliable, wiggle-free seat is guaranteed. Depending on the fit between the components, the friction lock can also be increased, in order to arrive at a type of locking.
  • the longitudinal groove extends over a predetermined part of the total length of the assigned shaft segments.
  • the tongue extends over a predetermined part of the total length of the plug-in shaft. In this way, mutual contact over as large an area as possible is made possible and, at the same time, critical material weakening is reduced.
  • Groove and tongue can also be configured in wedge shape, for example in order to obtain a friction lock, which becomes all the greater the more the final installation position of these parts, which are pushed into one another, is reached as the fuse insert and insulating body are joined together.
  • each free end of a contact segment of a contact tongue of a fuse insert can have a center notch.
  • This center notch makes it possible to spread the notched head end of the contact segments, for example by setting on a corresponding pressure tool. In this way, the contact segments and thereby the fuse insert are locked together with the insulating body.
  • FIG. 1 an insulating body of a fuse from above
  • FIG. 2 a view of the insulating body in a section along the line II-II in FIG. 1 ,
  • FIG. 3 a fuse insert configured as a flat plug, having contact segments connected by way of a fusible conductor, in a side view,
  • FIG. 4 a view of a fuse insert configured as a flat plug, according to FIG. 3 , in a section along the line IV-IV in FIG. 3 , and
  • FIG. 5 a side view of the complete fuse consisting of insulating body and fuse insert disposed in it.
  • FIG. 1 shows a top view of an insulating body 1 for a fuse.
  • the insulating body 1 has accommodations 2 and 3 , which are configured as plug-in shafts 4 and 5 .
  • a connection element 6 projects into the plug-in shaft 4 .
  • a connection element 7 also projects into the plug-in shaft 5 .
  • the connection elements are configured as tongues 8 , 9 that have been formed on.
  • the insulating body 1 is an injection-molded part made of plastic. Here, the insulating body is shown in approximately 10 ⁇ magnification.
  • FIG. 2 shows a view of the insulating body 1 in section along the line II-II in FIG. 1 .
  • the same components are designated with the same reference numbers.
  • FIG. 2 makes it clear how the tongue 8 projects into the plug-in shaft 4 , and that the tongue 8 extends merely over part of the length of the plug-in shaft 4 .
  • FIG. 3 shows the electrically conductive fuse insert made of metal, which is accommodated in the insulating body 1 .
  • the fuse insert which is configured as a flat plug, consists of contacts 10 and 11 , disposed next to one another to form a pair, having lower contact tongues 12 and 13 , as well as contact segments 14 and 15 that are situated in the upper part.
  • the contact segments 14 and 15 are connected with one another in electrically conductive manner by means of a fusible conductor 16 .
  • Each contact segment 14 , 15 is configured as a shaft part that fits into and can be plugged into the plug-in shaft 4 , as shown here, which part has at least one engagement 17 or 18 , respectively, for the projecting first connection element 6 or 7 , respectively, of the insulating body 1 .
  • a center notch 19 or 20 is disposed at each free end of a contact segment 14 or 15 , respectively, which faces away from the contact tongue 12 or 13 , respectively. This center notch 19 , 20 can be used for interlocking with the insulating body 1 , by means of being bent apart or spread, using a suitable tool.
  • FIG. 4 shows a view of the fuse insert according to FIG. 3 , configured as a flat plug, in a section along the line IV-IV in FIG. 3 .
  • the same components are designated with the same reference numbers.
  • FIG. 4 shows that the engagement 17 , and therefore also the engagement 18 in the contact segment 15 , or in the contact segment 14 , respectively, is configured as a longitudinal groove, which extends over the major part of the total length of the assigned contact segment 14 or 15 , respectively.
  • FIG. 5 shows a side view of a fuse having a flat insulating body 1 with fuse insert accommodated in it, the contacts 10 , 11 of which project out of the insulating body 1 , if the contact segments of the contacts 10 , 11 , which segments are configured as shaft parts, are inserted into the corresponding accommodations of the insulating body 1 from below, whereby the connection elements (engagement 17 , 18 , and projecting elevations 6 , 7 , respectively) that correspond to one another, indicated with broken lines here, enter into a positive-lock connection.
  • the fuse insert has predetermined regions of the surfaces of each plug-in shaft 4 and 5 and has associated contact segments 14 and 15 , which surfaces can be brought into contact with one another, and have surface profiling that increases the friction.
  • This surface profiling comprises small teeth configured as barbs 30 , 32 and 34 , which block movement counter to the insertion direction of the contacts into the insulating body 1 .
  • FIG. 2 shows the barbs 30 on shaft 4 .
  • FIG. 3 shows the barbs 32 on contact segment 14 and the barbs 34 on the contact segment 15 .

Landscapes

  • Fuses (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
US10/582,733 2003-12-13 2004-12-13 Fuse insert having a flat insulating body Active 2025-04-16 US7515030B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20319350U DE20319350U1 (de) 2003-12-13 2003-12-13 Sicherungseinsatz mit flachem Isolierkörper
DE20319350.4 2003-12-13
PCT/DE2004/002729 WO2005057602A1 (de) 2003-12-13 2004-12-13 Sicherungseinsatz mit flachem isolierkörper

Publications (2)

Publication Number Publication Date
US20070080772A1 US20070080772A1 (en) 2007-04-12
US7515030B2 true US7515030B2 (en) 2009-04-07

Family

ID=31984835

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/582,733 Active 2025-04-16 US7515030B2 (en) 2003-12-13 2004-12-13 Fuse insert having a flat insulating body

Country Status (6)

Country Link
US (1) US7515030B2 (ja)
EP (1) EP1697958B1 (ja)
JP (1) JP2007514284A (ja)
AT (1) ATE470233T1 (ja)
DE (3) DE20319350U1 (ja)
WO (1) WO2005057602A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120044037A1 (en) * 2008-01-14 2012-02-23 Littelfuse, Inc. Blade fuse

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100127817A1 (en) * 2008-11-25 2010-05-27 Banzo Juan I Fuse assembly and fuse therefor

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909767A (en) * 1974-01-14 1975-09-30 Littelfuse Inc Miniature plug-in fuse
US3962782A (en) * 1974-01-14 1976-06-15 Littelfuse, Inc. Method of making a miniature plug-in fuse
US4040175A (en) * 1974-01-14 1977-08-09 Littelfuse, Inc. Method of making a miniature plug-in fuse with fragile fuse link
US4203200A (en) 1977-08-01 1980-05-20 Wiebe Gerald L Method and apparatus for making an encapsulated plug-in blade fuse
US4224592A (en) * 1978-04-03 1980-09-23 Mcgraw-Edison Company Miniature plug-in fuse assembly and method of manufacture
EP0038494A1 (de) 1980-04-17 1981-10-28 Siemens Aktiengesellschaft Kontaktträger
US4349804A (en) * 1981-05-29 1982-09-14 Mcgraw-Edison Fuse assembly for a miniature plug-in fuse
US4394638A (en) 1982-07-21 1983-07-19 Essex Group, Inc. Miniature plug-in fuse assembly and method of making a fuse element therefor
US4499447A (en) * 1983-06-17 1985-02-12 Guim Multi-Tech Corporation Blade terminal fuses with integrity indicator
US4580124A (en) * 1984-08-17 1986-04-01 Littelfuse, Inc. Plug-in fuse assembly
US4604602A (en) * 1984-08-17 1986-08-05 Littelfuse, Inc. Plug-in fuse assembly with stackable housing
US4635023A (en) * 1985-05-22 1987-01-06 Littelfuse, Inc. Fuse assembly having a non-sagging suspended fuse link
US4670729A (en) * 1986-06-03 1987-06-02 Littelfuse, Inc. Electrical fuse
EP0354676A1 (en) 1988-08-09 1990-02-14 The Whitaker Corporation Method of manufacture of a fuse assembly
US5239282A (en) * 1991-10-09 1993-08-24 Amp Incorporated Electrical blade fuse
US5598138A (en) * 1995-01-03 1997-01-28 Jaronczyk, Jr.; Joseph P. Fault-indicating blade fuse
US5629664A (en) * 1994-09-27 1997-05-13 Yazaki Corporation Blade fuse with bifurcated gripping pieces
US5818320A (en) * 1996-10-08 1998-10-06 Yazaki Corporation Fuse assembly with removable fusible element
US6529113B2 (en) * 2000-05-18 2003-03-04 Yazaki Corporation Push-in type fuse
US6556120B2 (en) * 2000-05-16 2003-04-29 Yazaki Corporation Fuse
US6577222B1 (en) * 1999-04-02 2003-06-10 Littelfuse, Inc. Fuse having improved fuse housing
US6608546B2 (en) * 2000-03-03 2003-08-19 Pacific Engineering Corp. Fuse and fuse support
US20040070485A1 (en) * 2000-11-22 2004-04-15 Hideki Andoh Blade fuse

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909767A (en) * 1974-01-14 1975-09-30 Littelfuse Inc Miniature plug-in fuse
US3962782A (en) * 1974-01-14 1976-06-15 Littelfuse, Inc. Method of making a miniature plug-in fuse
US4040175A (en) * 1974-01-14 1977-08-09 Littelfuse, Inc. Method of making a miniature plug-in fuse with fragile fuse link
US4203200A (en) 1977-08-01 1980-05-20 Wiebe Gerald L Method and apparatus for making an encapsulated plug-in blade fuse
US4224592A (en) * 1978-04-03 1980-09-23 Mcgraw-Edison Company Miniature plug-in fuse assembly and method of manufacture
EP0038494A1 (de) 1980-04-17 1981-10-28 Siemens Aktiengesellschaft Kontaktträger
US4349804A (en) * 1981-05-29 1982-09-14 Mcgraw-Edison Fuse assembly for a miniature plug-in fuse
US4394638A (en) 1982-07-21 1983-07-19 Essex Group, Inc. Miniature plug-in fuse assembly and method of making a fuse element therefor
US4499447A (en) * 1983-06-17 1985-02-12 Guim Multi-Tech Corporation Blade terminal fuses with integrity indicator
US4580124A (en) * 1984-08-17 1986-04-01 Littelfuse, Inc. Plug-in fuse assembly
US4604602A (en) * 1984-08-17 1986-08-05 Littelfuse, Inc. Plug-in fuse assembly with stackable housing
US4635023A (en) * 1985-05-22 1987-01-06 Littelfuse, Inc. Fuse assembly having a non-sagging suspended fuse link
US4670729A (en) * 1986-06-03 1987-06-02 Littelfuse, Inc. Electrical fuse
EP0354676A1 (en) 1988-08-09 1990-02-14 The Whitaker Corporation Method of manufacture of a fuse assembly
US5239282A (en) * 1991-10-09 1993-08-24 Amp Incorporated Electrical blade fuse
US5629664A (en) * 1994-09-27 1997-05-13 Yazaki Corporation Blade fuse with bifurcated gripping pieces
US5598138A (en) * 1995-01-03 1997-01-28 Jaronczyk, Jr.; Joseph P. Fault-indicating blade fuse
US5818320A (en) * 1996-10-08 1998-10-06 Yazaki Corporation Fuse assembly with removable fusible element
US6577222B1 (en) * 1999-04-02 2003-06-10 Littelfuse, Inc. Fuse having improved fuse housing
US6608546B2 (en) * 2000-03-03 2003-08-19 Pacific Engineering Corp. Fuse and fuse support
US6556120B2 (en) * 2000-05-16 2003-04-29 Yazaki Corporation Fuse
US6529113B2 (en) * 2000-05-18 2003-03-04 Yazaki Corporation Push-in type fuse
US20040070485A1 (en) * 2000-11-22 2004-04-15 Hideki Andoh Blade fuse
US6967560B2 (en) * 2000-11-22 2005-11-22 Pacific Engineering Corp. Blade fuse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
International Search Report in English.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120044037A1 (en) * 2008-01-14 2012-02-23 Littelfuse, Inc. Blade fuse
US8976000B2 (en) * 2008-01-14 2015-03-10 Littelfuse, Inc. Blade fuse

Also Published As

Publication number Publication date
DE112004002753D2 (de) 2006-11-23
DE502004011250D1 (de) 2010-07-15
WO2005057602A1 (de) 2005-06-23
DE20319350U1 (de) 2004-03-04
EP1697958B1 (de) 2010-06-02
EP1697958A1 (de) 2006-09-06
JP2007514284A (ja) 2007-05-31
ATE470233T1 (de) 2010-06-15
US20070080772A1 (en) 2007-04-12

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